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Finding the Fourth Proportional to 658.83, 988.21 and 196.61

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Solution

The fourth proportional to 658.83, 988.21 and 196.61 is: 294.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.83 : 988.21 = 196.61 : x
  2. Step 2: Convert to fraction form
    658.83/988.21 = 196.61/x
  3. Step 3: Cross multiply
    658.83x = 988.21 × 196.61
  4. Step 4: Simplify right side
    658.83x = 194,290.99
  5. Step 5: Solve for x
    x = 194,290.99/658.83
  6. Step 6: Final answer
    x = 294.90

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